The building is in a great location with easy access to the BTS and MRT train systems. Lots of restaurants, shopping, massage parlors, nightlife, etc. are accessible, either through the front entrance, or via the back passage to Sukhumvit soi 19.
As for the apartment, it is clean and very modern. It is perhaps a bit compact, but perfectly suitable.
There are indeed strict protocols to be followed in light of Thailand restrictions on renting out apartments. However, I was never approached by staff or anybody else, and the doorman always welcomed me with a smile.
Will be happy to stay in this apartment again in the future.